Bearing for bicycles.



'PATENTBD APR. :14, 1.903,V

C. J. DORP?. BEARING FOR BICYCL-Es.

APPLIGATIO'N FILED JAN. 16, 1903.

2 SHEETS-SHEET 1,

N MODEL.

A Il." M I w r l v Jn/vanto.

A n. Getaway "m: Nonms PETERS 60,. PNDTaLITNO., WASHINGTON. n. c

PATBNTED APR; 14, 190s U.' J. DORE'F. BEARING POBL BICYCLBS. APPLIOATION I'ILED JAN. ie, 190s.

Z SHEETS-SHEET 2.

No MODEL.

@Hoz und UNITED STATES -PArnim OFFICE.

CONRAD J. DORFF, OF CHICAGO, ILLINOIS, ASSIGNOR OF FORTY-NINE ONE-HUNDREDTHS VTO PETERl J. SOI-IARBACH, OF SAN FRANCISCO,

CALIFORNIA.'

BEARING FoRBlcYcLEs..

SPECIFICATION formnglpart of Letters Patent o. 7 2 5,547,`dated Apr114, 1903. Application filed January 16, 1903. Serial No. 139,360. (Nornodel.) y.

To all whom it may concer-n:

.Beit known that I, CONRAD J. Donne, a citizen of the United States of America, and

a resident of Chicago, Illinois, have invented' certain new and useful Improvements in With this general statementit may be said that the invention consists in the improvement as hereinafter more particularly described and then definitely pointed out by theclairns at the end hereof. Y

In the accompanying drawings, which clearly show my improvement, Figure 1 is a vertical section,taken lengthwise of the crankshaft, of a crank-hanger with my improved bearing therein. Fig. 2 is a bottom plan view of the same with parts broken away. Fig. 3 is a sectional view similar to that shown in Fig. 1, but with the crank-hanger and its bevel-gear partly withdrawn. Fig. 4 isa perspective view of a barrel and its connected;

cone. Fig. 5 is a vertical cross-sectionfrom the crank-hanger at the point where its lugsz are tightened.

Referring nowgto the details ofV the Adraw-y ings by numerals, 1 designates the crankhanger or bracket, which is formed inthe? usual or any preferred way with a housing 2 for the rotatable side shaft 3 and its bevelgear 4, all as clearly Vshownin Fig. 2. The crank-hanger is alsoprovided with the usual tubular portions 5 and', bywhich the hanger is'brazed or otherwise secured to the tubular framing. One end of the crank-hanger or bracket 1 is formed with an enlarged housing 7 for containing the large bevel-gear, and the under side ofl the opposite end of the hanger is formed with a slot 9, on opposite sides of the open end of which project, pref- 'of thefhan ger.

cated at 13.

erablyrintegral, lugs 10, -through which is adapted to pass any form of securing-bolt 11,

' by which the lugs may be drawn together and the'parts Within' the hanger thus firmly secured by pinching the same within the walls The only other characteristic about the'hanger proper isthat the open housing 7 fis screw-threaded internally, as indi- This open end `is-preferably closed by a gear-cover 17, which' isarrauged to screw tightly within the opening l5 and has a central aperture through which the crankshaft projects and rotates.

The crank-'shaft 20 is 'made in one integral piece, and while I have of course claimed nothing new in alone-piece crank-shaft per se I believe it is new incombination with the other features hereinafter claimed. The

crank-shaft is provided at one end with an integral collar 22 and a screw-threaded por- 7o tion 23, and a bevel-gear 24screws on said portion 23'and abuts against said collar 22, which thus prevents any further movement toward thecrankon that side of the shaft.. Near the oppositeend of thecrank-shaft is formed the integral collar 25, similar to the collar 22, and a cone 25,Vofordinary or any approved form, is secured on the shaft against the collar 25. The collar 25is of course sulficiently small in diameter to permit the bevel- "8o gear 24 tobe slipped over it,"so that said gear `may be put on oroff, as occasion may require. The bevel-gear, which has been described jas being secured to the one-piece `crank-shaft 20, is peculiarly formed, in that it basa ballrace 30 facing inf the opposite direction .to

which the teeth of the gear point for a purpose to be hereinafter described.

Fitting closely within the crank-hanger proper, 9, is a barrel 32, on one end of which 9e is secured, by screwing or otherwise, a cone 34, and the opposite end of this barrel is'screwlthreaded bot-h externally and internally, as

clearly shown in the perspective view in Fig.

4. This barrelis also provide'diwitha slot 95 35, for a purpose to be hereinafterdesc'ribed. Coaeting with the yinterior thread of said barrel 32 is a cone 38, which may, if desired, be arranged with a ball-retainer 39 of the usual or any form, and the exterior of this cone is formed with an annular ring 40, which is formed with two indentations 41 and 42, by which the cone may be turned with a snit'- able tool. Fitting on the exterior thread of the barrel 32 is a locking-ring 44, which will act as hereinafter described.

My crank-hanger may be put together in several ways, which may be briefiy described as follows: Assuming that the bevel-gear 24 and the cone 26 had been already properly screwed onto the crank-shaft 20, the barrel 32 is placed over the crank opposite the bevelgear, and as said barrel is slotted at 35 it permits the crank to pass into said slot, which allows the corner 20 of the crank-shaft and the enlarged cone 26 to pass into and through the barrel. The bevel-gear 24 is then held in a horizontal position, and the barrel is then dropped so as to rest therein, said barrel being now over the crank-shaft 2O and concentric thereto. A suitable number of balls is now dropped through the race formed by the cone 34 and the ball-race 30. cient balls are placed therein, the cone 38 is placed over the crank around the point 20a and is screwed into the barrel 32. This cone of course hasits balls contained therein, and as it is secured into position its balls bear onto the cone 26, and thus canse the barrel 32 to be lifted until the balls at the opposite end of the barrel are held between the cone 34 and the ball-race 30. After the cone 38 has been screwed in its position, just described, the bearing may be turned into any position desired without fear of the balls dropping ont. The bearing as a whole may be now inserted through the crank-hanger by rst inserting the crank opposite the bevelgear 24, and as said crank is permitted to pass through the slot 9 it is easy to insert the barrel 32,with its connected parts, in position. After the barrel is in position the lockingring 44 is screwed onto the barrel, and this holds the barrel in its proper position in the casing. In order to prevent the barrel turning within the casing, however, it is best to clench or bind the saine by means of the bolt 11 and its nut. r

Instead of securing the parts in position, as just described, the barrel 32 may be first placed in position with its slot 35 coinciding with the slot 9 and then the otherparts placed therein, as just described.

`After the parts have been placed in position in either of the ways just described the gear-cover 17 is screwed into its threaded opening 15, a disk or packing 4S having been iirst placed against the bevel-gear 24.

Of course it will be obvious from the foregoing description that the parts may be taken out either as an entirety by simply loosening the bolt lO and taking oit the locking-ring 44, in which case the balls will not be dropped When suffiposed to use a barrel or cylinder withina crank-hanger, which barrel is held in place by a locking-ring, and with which barrel coacts a bevel-gear having a ball-race arranged substantially like that shown in my drawings, and I therefore do not claim either of these devices separately. I regard, however, the device shown in my drawings as essentially different from anything heretofore proposed, as the special construction herein described permits me to use a one-piece crankshaft with the structure just described as being old.

What I claim as new is- 1. In a crank-hangerbearing, an outer casing having a housing fora gear-wheel, a barrel snugly fitting said casing, said outer casing and barrel each having a slot running longitudinally thereof, a one-piece crank-shaft within said barrel having a gear-Wheel thereon, said gear-wheel and said barrel having a ball-race formed between them, a cone screwing into the opposite end of said barrel and thereby holding the gear-wheel and crankshaft to said barrel; and a locking ring screwed on the free end of the barrel for adjusting the barrel in its proper lateral position; substantially as described.

2. In a crank-hanger bearing, an outer casing having a housing fora gear-wheel, a barrel snugly fitting said outer casing and havinga cone secured to one end, a one-piece crankshaft within said barrel, a gear-wheel secured to said shaft and having a ball-race between it and the cone on said barrel, a cone screwing into the free end of the barrel and thereby tightening the bearing and holding `the balls in position, a ring screwed onto the outer end of said barrel and adjusting the barrel and its connected gear-wheel in the proper lateral position; and lugs projecting from said casing having a bolt passing therethrough; said barrel and said casing being slotted to permit the crank passing through the same and the slot in the casing being between its lugs, substantially as described.

Signed by ine at Chicago, Illinois, this 20th day of December, 1902.

CONRAD J. DORFF.

Witnesses:

ROBERT BURNS, Jox-IN ENDERS, Jr.

IOO 

